Commuters walk past flowers and messages left outside Monument Underground station next to London Bridge. REUTERS/Peter Nicholls

PARIS (Reuters) - A third French citizen has died following Saturday's attack on London Bridge, President Emmanuel Macron said on Wednesday, taking the overall death toll to eight.

"We have had the latest toll confirmed this morning, which is three people dead and eight injured on the French side," said Macron, who was speaking during a joint news conference with Danish prime minister Lars Lokke Rasmussen.

British police hunting for a Frenchman missing since Saturday's attack said earlier that they had found a body in the River Thames.

The police said the formal identification of the body had not yet taken place but that the family of the missing Frenchman, 45-year-old Xavier Thomas, had been informed of the discovery. Macron did not disclose the victim's identity.

Le Parisien newspaper named the second Frenchman to die in the attack as 36-year-old Sebastien Belanger, while the other French victim was 27-year old Alexandre Pigeard.

(Reporting by Richard Lough and Jean-Baptiste Vey in Paris, and Kate Holton in London; editing by John Irish)